<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> MAR-31-2000 <PERIOD-START> OCT-01-1999 <PERIOD-END> DEC-31-1999 <CASH> 171,133 <SECURITIES> 546,967 <RECEIVABLES> 78,834 <ALLOWANCES> 3,011 <INVENTORY> 71,939 <CURRENT-ASSETS> 909,426 <PP&E> 245,217 <DEPRECIATION> 110,965 <TOTAL-ASSETS> 1,329,253 <CURRENT-LIABILITIES> 219,963 <BONDS> 229,800 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 104 <OTHER-SE> 868,586 <TOTAL-LIABILITY-AND-EQUITY> 1,329,253 <SALES> 211,446 <TOTAL-REVENUES> 211,446 <CGS> 69,529 <TOTAL-COSTS> 69,529 <OTHER-EXPENSES> 96,732 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 2,811 <INCOME-PRETAX> 50,493 <INCOME-TAX> 18,825 <INCOME-CONTINUING> 31,668 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 31,668 <EPS-BASIC> 0.31 <EPS-DILUTED> 0.29